Re: CONFIG_NO_HZ: missed ticks, stall (keyb IRQ required) [2.6.18-rc4-mm1]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]



On Tue, Nov 07, 2006 at 09:25:35AM +0100, Thomas Gleixner wrote:
> Andreas tested with the latest -mm1-hrt-dyntick patches, so he has all
> the checks already. The thing which worries me here is, that we detect
> the breakage and use the fallback path already, but it still has this
> weird effect on that system, while others just work fine. I'm cooking a
> more brute force fallback right now.

That's what I didn't understand all that time:
I do get the "C2 unusable, kills APIC timer" message, so I expected the code
to not use C2, but it seems it did use it (causing hangs) and I didn't
fully analyze the code whether it truly tried to prevent C2 here
(handling was a bit opaque to me, should have analyzed it
more thoroughly to get to know exactly what happens).

And like I said, brutally hard-wiring max_cstate to C1 already fixed
dynticks things for me, so it seems as if it still touched C2 before.

Andreas Mohr
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at
Please read the FAQ at

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux